Spirax Sarco LC3050 User manual

IM-P402-131 EMM Issue 9
1
© Copyright 2017
Printed in GB
IM-P402-131
EMM Issue 9
4025554/9
LC3050
Level Controller
Installation and Maintenance Instructions
1. Safety information
2. User instructions and
delivery information
3. System overview
4. Mechanical installation
5. Electrical installation
6. Commissioning
7. Communications
8. Maintenance
9. Fault nding
10. Technical information
11. Appendix
- Data registers
LC3050
AL
ALARM
OK

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Safe operation of this product can only be guaranteed if it is properly installed,
commissioned, used and maintained by qualified personnel (see Section 1.11) in
compliance with the operating instructions. General installation and safety
instructions for pipeline and plant construction, as well as the proper use of tools
and safety equipment must also be complied with.
Your attention is drawn to IEE Regulations (BS 7671, EN 12953, EN 12952 and
EN 50156). Elsewhere, other regulations will normally apply.
All wiring materials and methods shall comply with relevant EN and IEC standards
where applicable.
Warning
This product is designed and constructed to withstand the forces encountered
during normal use. Use of the product other than as a level limiter, or failure to
install the product in accordance with these Instructions or to make product
modifications or repair could:
-Cause injury or fatality to personnel.
-Cause damage to the product / property.
-Invalidate the marking.
These instructions must be stored in a safe place near the product installation at
all times.
Warning - LP30 or LP31 level probe and LC3050 level controller
The above products comply with the requirements of the European Pressure
Equipment Directive 2014/68/EU and carry the mark.
They are classed as Safety Accessories and therefore fall within Category 4 of the
Directive.
An assessment upon the LP3050 / LP30 Low Level Alarm System concluded it meets
the requirements of IEC 61508-2:2010, to Saftey Integrity Level of SIL2 when used
in a 1oo1 architecture and SIL3 when used in 1oo2 architecture.
This product complies with Electromagnetic Compatibility Directive 2014/30/EU
and all its requirements.
This product meets all the Requirements of the Directive and is suitable for Class
A Environments (i.e. Industrial). The LC3050 meets the requirements of the Directive
by meeting the Controlling standard:
-EN 61326-1: 2006 - Electrical equipment for measurement control and laboratory
use - EMC requirements Part 1: General requirements.
1. Safety information

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The product may be exposed to interference above the limits of Heavy Industrial
Immunity if:
-The product or its wiring is located near a radio transmitter.
-Excessive electrical noise occurs on the mains supply. Power line protectors
(ac) should be installed if mains supply noise is likely. Protectors can combine
filtering, suppression, surge and spike arrestors.
-Cellular telephones and mobile radios may cause interference if used within
approximately 1 metre (39") of the product or its wiring. The actual separation
distance necessary will vary according to the surroundings of the installation
and the power of the transmitter.
This product complies with Low Voltage Directive 2014/35/EU by meeting the
standards of:
-EN 61010-1: 2010 Safety requirements for electrical equipment for measurement,
control, and laboratory use.
This product has been type-tested, and the documentation validated, as a Special
Design Water Level Limiter by meeting the Standard:
-VdTÜV requirements for water level control and limiting devices, water level
100 (07.2006).
If the product is not used in the manner specified in this IMI, then the protection
provided may be impaired.
Static precautions (ESD)
Static precautions must be observed at all times to avoid damage to the product.
Level control and level limiting products in steam boilers
Products / systems must be selected, installed, operated, and tested in accordance
with:
-Local or National standards and regulations.
-Guidance Notes, (Health and Safety Executive PM5 in the UK).
-The requirements of Approvals Authorities.
-Boiler Inspection Bodies.
-Boiler manufacturer’s specifications.

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Functional Safety to IEC 61508
The LC3050 is certified to IEC 61508 if used in conjunction with the LP30 Low
Level Probe. This standard describes the Functional Safety of safety-related
electrical /electronic / programmable electronic systems. The Safety Function of
the LC3050 corresponds to a Safety Integrity (SIL) 2 when used in a 1oo1 architecture
and SIL 3 when used in a 1oo2 architecture.
In most countries two independent low water limiting systems must be installed
on steam boilers.
Level probes must be installed in separate protection tubes / chambers, with
sufficient clearance between the tips and earth.
Each probe must be connected to an independent controller. The alarm relays must
isolate the boiler heat supply at low alarm status.
A high water alarm may be part of the water level control, or a separate system. An
independent high water alarm system must be fitted if it is considered a safety
requirement.
In this case, the relays must simultaneously isolate the feedwater supply and the
boiler heat supply at high alarm status. All boiler water limiters require regular
functional testing.
The level probe and controller is only part of the safety system. To complete the
system, additional circuitry (wiring, relays, alarm bell / lamp etc.) is required.
A suitable water treatment regime must be used to ensure continuous safe and
correct operation of the control and limiter systems. Consult the above authorities
and a competent water treatment company.
Failed product
In the unlikely event of a fault condition to trigger the alarm with the LC3050 / LP30
low level system the standard Maintenance and Fault finding procedures listed in
this instruction manual must be followed - Please refer to Section 9.
In the event the condition cannot be resolved, the standard device repair and return
procedures listed in Section 10.2 of this manual must be followed.
The end user shall retain failed components and return them to Spirax-Sarco
Limited along with details of failure mode and time in service (operational).
This will allow the 'actual' failure rates to be calculated and compared with those
estimated in the Failure, Modes, Effects Diagnostics Analysis (FMEDA). A FMEDA is
one of the steps to be taken to achieve functional safety certification per IEC 61508
of a device. From the FMEDA, failure rates are determined and consequently the Safe
Failure Fraction (SFF) is calculated for the device. For full safety certification
purposes all requirements of IEC 61508 will be considered.
Leading to product improvement and hence maintaining /reassuring its SIL rating.
We wish to encourage end-users to collect failure rate data and to provide feedback
on design integrity.

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Product lifetime / replacement limits
According to section 7.4.9.5 of IEC 61508-2, a useful lifetime, for the LC3050, based
on experience, has been assumed. Although a constant failure rate is assumed by
probabilistic estimation method, this only applies provided that the useful lifetime
of components is not exceeded. Beyond their useful lifetime the result of the
probabilistic calculation method is therefore meaningless, as the probability of
failure significantly increases with time. The useful lifetime is highly dependent
on the subsystem itself and its operating conditions.
The product has gained its SIL2 rating on the assumption that electrolytic
capacitors are to be replaced every 8 years.
It is the responsibility of the user to maintain and operate the LC3050 / LP30 low
level alarm system per the manufacturer’s instructions. Furthermore, regular
inspection should indicate that all components are free of damage.

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Page 1of 5Version 6
Ltd
PRfsS Ltd
Functional Safety Services
Declaration of Conformity
This Declaration of Conformity is with regards to the
Electronic Hardware and associated LP30 conductivity probe of the
LC 3050/LP30 Low Level Alarm System
manufactured by
Spirax Sarco Ltd
Charlton House,
Cheltenham,
Gloucestershire
GL53 8ER,
UK
PRfsS Ltd have performed an assessment of the LC3050/LP30 with reference to the CASS
methodologies and found it to meet the requirements of
IEC61508-2:2010
Performing the safety functions stated in the associated report in both demand and continuous
mode to a Safety Integrity Level of SIL2 when used in a1oo1 architecture and SIL3 when
used in a 1oo2 architecture.
This declaration is made subject to the conditions on Page 4of this document
Assessment performed by: P R Smith, BA CEng FIET FInstMC MSARS

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The LC3050 is a single channel level alarm capable of measuring conductivity at a fixed point
determined by the position of a Spirax Sarco Ltd LP30 High integrity low level alarm probe and is
intended for low water level detection in steam and hot water boilers.
The safety integrity relies on correct installation of the probe in accordance with the
manufacturer’s installation and maintenance manuals and frequent proof testing, and connection
of the appropriate safety actuator(s) using both LC3050 safety relays configured in series to
ensure that the safety function will be carried out by either LC3050 relay being de-energised.
Note: That the normal recommended application of the LC3050 is in a 1oo2 architecture with two
separate LC3050’s and two separate LP30 level probes. The output relays are now connected so
that any one of four output relays will implement the safety function on demand.
Safety functions
The safety function covered by this declaration of conformity is to trigger an alarm by de-
energizing an output relay on detecting a water level limit after a pre-set delay.
Product identification and configuration
The LC3050 version covered by this declaration is defined in the Manufacturer’s drawings listed
below:
Document number
Rev
Date
Document description
4025518
3
2
6
/
0
6
/201
3
Cir
cuit Diagram for LC3050 (Safety Related Circuits)
4025519
3
08/12/2011
Circuit Diagram for LC3050 (Non
-
Safety Related Circuits)
4025528
4
25/03/2014
Silk Screen component layout for LC3050
402552
9
3
06/12/2011
Silk Screen component layout for LC3050
4
02557
8
7
28/05/2014
Component List (
-
Safety Related Circuits)
4025589
3
18/01/2012
Component List (
-
Non Safety Related Circuits)
The assessment has been carried out with reference to the Conformity Assessment of Safety-
related Systems (CASS) guidance. This includes an assessment of the techniques and measures

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used to avoid systematic failures introduced during the lifecycle and the control of failures during
operation.
A Failure Mode Effects and Diagnostics Analysis (FMEDA) has been carried out as part of this
assessment and has established the failure modes and random failure rates for the LC3050.
According to BS EN 61508-2:2010 route 1Hwas used to determine the maximum safety integrity
that may be claimed. The failure data source was ‘Reliability, Maintainability and Risk’, 6th Edition
by Dr David J. Smith.
The results are summarised below in Tables 1 and 2:
Table 1 – Low Demand Mode, 1oo1 architecture
Safety
function
λDU
x 10-6
/hr
λDD
x 10-6
/hr
λSU
x 10-6
/hr
λSD
x 10-6
/hr
No
effect
x 10-6
/hr
λTOTAL
x 10-6
/hr
t
CE
SFF
PFD
AVG
Low
water
level
detection
0.174 1.196 0.179 267 1.569 270 564 99.9% 0.0008
Diagnostic coverage may be calculated, using the figures of Table 1, to be 87% for dangerous
failures and 99% for safe failures.
Table 2 –High Demand Continuous Mode, 1oo1 architecture
Safety
function
λDU
x 10-6
/hr
λDD
x 10-6
/hr
λSU
x 10-6
/hr
λSD
x 10-6
/hr
No
effect
x 10-6
/hr
λTOTAL
x 10-6
/hr
SFF
PFH
G
Low
water
level
detection
0.174 1.196 0.179 267 1.569 27099.9% 1.74x10-7

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Page 4of 5Version 6
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The failure data given in Tables 1 and 2 above was derived using the following:
Proof Test interval = 1 year
Mean Time to Repair = 8 hours
The LC3050/LP30 system is considered to be a Type A equipment with reference to
IEC61508-2, paragraph 7.4.3.1.2.
The highest systematic SIL capability is SIL3
Fault Tolerance is ‘0’ for a single LC3050 as it has no inbuilt redundancy. (Note that the
LC3050 is intended to be used in redundant pairs).
Environment / stress criteria –FMEDA carried out using a quality factor and environmental
factor of 1.
Environmental Limits – 0oC to +55oC
Lifetime/ replacement limits –electrolytic capacitors to be replaced every 8 years
Management of Functional Safety
Spirax Sarco Ltd have a certified Functional Safety management system in place.
Date of certification: 15th August 2014
Certificate No.: SIRA CASS 00020/00
Scope: Liquid Level Controllers, Alarm subsystems and indicators
Applicable Lifecycle Phase: Phase 10
Conditions of Safe Use
To maintain functional safety the following conditions of safe use must be observed:
1. The Product shall be installed, operated and maintained by competent personnel in
accordance with the instructions in the Manufacturer’s Installation, operations and
Maintenance manual;
2. The product shall be subject to proof tests as specified in the Manufacturer’s Installation
and Maintenance Manual at intervals not exceeding those given on Page 3 of this
Declaration of Conformity;
3. Only the Manufacturer’s recommended replacement parts shall be used;
4. The serial communication port is not and must not be used as part of the safety function;
(contd…..)

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5. Strict adherence to The Manufacturer’s specified applications for The Product and the
environmental and lifetime limitations as shown on Page 3of this Declaration of
Conformity and in the Manufacturers data sheet;
6. The achievement of functional safety relies not only on the satisfactory operation of the
LC3050/LP30 system in response to a deviation in conductivity as measured by the sensor
probe but also on the ability of a trained operator to take action in the event of a hazard
or from failures revealed by calibration, proof testing or system failure;
7. Proof testing may require the system to be fully or partially taken off-line. The PFDavg will
vary from that calculated in proportion to the time taken off line and must be calculated
for a particular application taking this into account along with the failure rates of the other
loop components which aren’t in the scope of this Declaration of Conformity but are
necessary to complete the required safety function.
8. The Manufacturer’s Restrictions in Use recommendations must be followed in their
entirety.
9. The end user shall retain failed components and return them to Spirax Sarco Ltd along
with details of failure mode and time in service (operational). This will allow the ‘actual’
failure rates to be calculated and compared with those estimated in the FMEDA.

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Symbols used within these Installation and Maintenance
Instructions or on the product rating label
Equipment protected throughout by double insulation or reinforced
insulation.
Functional earth (ground) terminal, to enable the product to function
correctly.
Not used to provide electrical safety.
Clean earth / ground.
Safety earth.
Caution, risk of electric shock.
Caution, risk of danger, refer to accompanying documentation.
Optically isolated current source or sink.
Caution, Electrostatic Discharge (ESD) sensitive circuit. Do not touch
or handle without proper electrostatic discharge precautions.
ac, alternating current.

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1.1 Intended use
i) This product is primarily intended for use in steam and hot water boilers. It
may be used for other applications if the conductivity of the liquid is of at
least 30 μS / cm.
ii) Check material suitability, pressure and temperature and their maximum and
minimum values. If the maximum operating limits of the product are lower than
those of the system in which it is being fitted, or if malfunction of the product
couldresult in a dangerous over-pressure or over-temperature occurrence, ensure
a safety device is included in the system to prevent such over-limit situations.
iii) Determine the correct installation situation and direction of fluid flow.
iv) Spirax Sarco products are not intended to withstand external stresses that may
be induced by any system to which they are fitted. It is the responsibility of the
installer to consider these stresses and take adequate precautions to minimise
them.
v) Remove protection covers from all connections and protective film from all name-
plates, where appropriate, before installation on steam or other high temperature
applications.
1.2 Access
Ensure safe access and if necessary a safe working platform (suitably guarded)
before attempting to work on the product. Arrange suitable lifting gear if required.
1.3 Lighting
Ensure adequate lighting, particularly where detailed or intricate work is required.
1.4 Hazardous liquids or gases in the pipeline
Consider what is in the pipeline or what may have been in the pipeline at some
previous time. Consider: flammable materials, substances hazardous to health,
extremes of temperature.
1.5 Hazardous environment around the product
Consider: explosion risk areas, lack of oxygen (e.g. tanks, pits), dangerous gases,
extremes of temperature, hot surfaces, fire hazard (e.g. during welding), excessive
noise, moving machinery.
1.6 The system
Consider the effect on the complete system of the work proposed. Will any proposed
action (e.g. closing isolation valves, electrical isolation) put any other part of the
system or any personnel at risk?
Dangers might include isolation of vents or protective devices or the rendering
ineffective of controls or alarms. Ensure isolation valves are turned on and off in a
gradual way to avoid system shocks.

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1.7 Pressure systems
Ensure that any pressure is isolated and safely vented to atmospheric pressure.
Consider double isolation (double block and bleed) and the locking or labeling of
closed valves. Do not assume that the system has depressurised even when the
pressure gauge indicates zero.
1.8 Temperature
Allow time for temperature to normalise after isolation to avoid danger of burns.
1.9 Tools and consumables
Before starting work ensure that you have suitable tools and / or consumables
available. Use only genuine Spirax Sarco replacement parts.
1.10 Protective clothing
Consider whether you and /or others in the vicinity require any protective clothing
to protect against the hazards of, for example, chemicals, dust, high /low temperature,
radiation, noise, falling objects, and dangers to eyes and face.
1.11 Permits to work
All work must be carried out or be supervised by a suitably competent person.
Installation and operating personnel should be trained in the correct use of the
product according to the Installation and Maintenance Instructions.
Where a formal ‘permit to work’ system is in force it must be complied with. Where
there is no such system, it is recommended that a responsible person should know
what work is going on and, where necessary, arrange to have an assistant whose
primary responsibility is safety.
Post ‘warning notices’ if necessary.
1.12 Handling
Manual handling of large and/or heavy products present a risk of injury. Lifting,
pushing, pulling, carrying or supporting a load by bodily force can cause injury,
particularly to the back. You are advised to assess all risks taking into account the
task, the individual, the load and the working environment and use the appropriate
handling method depending on the circumstances of the work being done.
N.B: Electronics products:- Electrostatic discharge - Appropriate ESD precautions,
(e.g grounded wrist strap, static dissipative work area) must be taken when handling
to avoid damage to the product.
1.13 Residual hazards
In normal use the external surface of the product may be very hot.
Many products are not self-draining. Take due care when dismantling or removing
the product from an installation.
1.14 Freezing
Provision must be made to protect products that are not self-draining against frost
damage in environments where they may be exposed to temperatures below
freezing point.

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1.15 Disposal
On disposal of the unit or component, appropriate precautions should be taken in
accordance with local / National regulations.
Unless otherwise stated in the Installation and Maintenance Instructions this product
is recyclable and no ecological hazard is anticipated with its disposal providing due
care is taken.
1.16 Returning products
Customers and stockists are reminded that under EC Health, Safety and Environment
Law, when returning products to Spirax Sarco they must provide information on any
hazards and the precautions to be taken due to contamination residues or mechanical
damage which may present a health, safety or environmental risk. This information
must be provided in writing including Health and Safety data sheets relating to any
substances identified as hazardous or potentially hazardous.

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2. User instructions and delivery
information
Certain computer programs contained
in this product were developed by
Spirax-Sarco Limited ("the Work(s)").
Copyright © Spirax-Sarco Limited 2017
All rights reserved
Spirax-Sarco Limited grants the legal
user of this product (or device) the
right to use the Work(s) solely within
the scope of the legitimate operation
of the product (or device). No other
right is granted under this licence. In
particular and without prejudice to the
generality of the foregoing, the Work(s)
may not be used, sold, licensed,
transferred, copied or reproduced in
whole or in part or in any manner or
form other than as expressly granted
here without the prior written consent
of Spirax-Sarco Limited.
2.1 General description
The Spirax Sarco LC3050 is a high / low
level limiting monitor and alarm suitable for
use in conductive liquids.
The LC3050 is defined as a special design
electronic water level limiter in the context
of EN 12952.
It is designed for use with Spirax Sarco high
or low level, self-monitoring, high integrity
level probes, types LP31 and LP30.
The LC3050 is available as just one version
to suit supply voltage ranges 110 - 120 Vac
and 220 - 240Vac. See Section 5.
Green Normal Level
Red Level alarm - Boiler water low / high
(depending on application)
LC3050
AL
ALARM
OK
WARNING; In most countries,
steam boilers operating with
limited supervision require two
self-monitoring level probes
and controllers to provide two
independent low level alarms. A
high level alarm is also advised,
and is compulsory in some
countries.
WARNING: The minimum
conductivity is 30 µS/cm or 30 ppm.
The product can be panel, DIN rail or
chassis mounted.
The front panel has two LEDs,
indicating normal and alarm
conditions, and a test button (AL).
Press and hold this button to test the
alarm. This provides a full test of the
probe, controller, and associated circuits.
Refer to Section 6 'Commissioning' for
details.
The other buttons on the keypad are
non-functional.
Fig. 1 Keypad button identification

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2.2 The LC3050 cyclic self-testing function
An automatic cyclic test of the probe, probe cable and controller integrity is carried out
every few seconds by internally simulating a fault in the probe. If a fault should occur it will
activate the alarm and shut down the burner. The system will detect both open circuit and
short circuit conditions in the probe cable. This self-test is used to provide failure detection
without interrupting normal operation.
With the water at a normal level in the boiler, the Green LED will be lit. The Green LED briefly
extinguishes every few seconds indicating the automatic cyclic test is being carried out. If at
any time the Red LED is lit, either a low water level or system fault has been detected. If boiler
water level is normal the user should consult section 9 Fault finding for system diagnostics.
A full, manual test of the probe, cable, controller and associated circuits can be carried out
using a front panel test button marked ALM. See Section 6 Commissioning. If two LC3050
controllers are present in the system, this manual test should be carried out on both.
Provision is made for the wiring of a remote test button if required (See Figures 6 and 7,
Section 5.4).
2.3 Equipment delivery, handling and storage
Factory shipment
The product is tested, calibrated and inspected prior to shipment, to ensure reliable operation.
Receipt of shipment
At the time of delivery each carton should be inspected for possible external damage. Any
visible damage should be recorded immediately on the carrier’s copy of the delivery slip.
Quantity Description
1x LC3050 level controller
1x IMI ( this document)
1x Front bezel
1x Foam gasket
2x Fibre washers
2x M4 x 20 panel head (configuration)
1x Front panel configuration label
1x ENC2 DIN rail clip
Each carton should be unpacked carefully and its contents checked for damage. If it is found
that some items have been damaged or are missing, notify Spirax Sarco immediately and
provide full details. In addition, damage must be reported to the carrier with a request for
their on-site inspection of the damaged item and its shipping carton.
Storage
If the product is to be stored for a period prior to installation, the environmental storage
conditions should be at a temperature between 0 °C and 65 °C (32 °F and 149 °F), and
between 10% and 90% relative humidity (non-condensing).
Ensure there is no condensation within the unit before installing and connecting
the power.

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3. System overview
The system consists of the LC3050 controller and the LP30 Low Level Probe. Alternatively,
the system can be configured to detect a high level using the LP31 High Level Probe. If either
a low water level or a system failure is detected, then the red LED (ALARM) is lit, the dual
alarm relays are de-energised, an alarm is sounded and the boiler burner turned off.
The alarm condition will be enabled even if two independent random electronic failures
have occurred. The ability of the self-test circuit to shut down the boiler is not tested during
the self-test. Therefore this circuit is duplicated and is verified during manual test. The
frequency of manual testing must be in line with local regulations and should usually be
performed weekly.
The LC3050 unit is assembled from two PCB’s: the LC3 – 4025518 and the MB3 – 4025519.
The LC3 – 4025518 contains all the safety electronics and there is no embedded software
on this PCB. The MB3 – 4025519 contains the communications and monitoring electronics
and plays no role in the safety functions.
Inputs
The product accepts inputs from the LP30 low level probe or the LP31 high level probe.
Function
The LC3050 compares the resistance to earth from the probe, through the water, to the boiler
or vessel shell. If a change in water level causes this resistance to change beyond a set limit,
a timer is engaged which alters the state of an internal relay after a pre-set delay. This signal
is used to trigger an alarm.
A compensation tip on the probe compensates for any leakage to earth caused by scale, dirt,
or internal moisture, ensuring an alarm signal even under adverse conditions.
The product can communicate via an infrared link with adjacent boiler house controllers only
if installed into the same enclosure ! See Section 4. (Spirax Sarco products only). The LC3050
is designated as a slave unit only – see Section 7, Communications.

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Note: Read the 'Safety information' in Section 1 before installing the product.
At all times during installation, normal use or maintenance, the rear of the LC3050 in particular
must be protected from environmental pollutants entering into the product. Therefore the
product must be installed in a suitable industrial control panel or fireproof enclosure to provide
impact and environmental protection. A minimum of IP54 (EN 60529) or Type 3, 3S, 4, 4X,
6, 6P and 13 (UL50/NEMA250) is required. If installed in a harsh environment (conductive
dust and / or wet conditions), a higher degree of protection is required.
- Caution 1: The product must only be installed in the vertical orientation.
- Caution 2: Do not cover or obstruct the infrared beam between the products.
- Caution 3: Ensure that the red and green LED status indicators can be easily
seen by the operator.
- Caution 4: During use the boiler control panel or enclosure doors must be kept
closed at all times unless installation or maintenance work is being carried out.
4.1 Environmental conditions
Install the product in an environment that minimises the effects of heat, vibration, shock and
electrical interference (see Section 1 -'Safety information').
Do not install the product outdoors without additional weather protection.
Do not attempt to open the product _it is sealed and has no replaceable parts or
internal switches.
4.2 Installation on a DIN rail
The product is provided with a clip and a set of self-tapping screws to secure it to a 35 mm
DIN rail. On the rear of the enclosure, two sets of holes and an adjustable clip are provided
to give alternative mounting height positions. Locate the clip onto one set of holes and secure
it using the two screws provided. Ensure the spring clip is fully engaged with the rail.
Warning: Only use the screws provided with the product.
4. Mechanical installation

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Fixing template cutout notes:
- Solid line indicates cutout required for panel mounting.
- Broken line indicates product outline.
- A minimum gap of 15 mm between units must be provided for product cooling.
- Mounting hole dimensions are the same for both panel and wall mounting.
4.3 Installation on a chassis plate:
- Drill holes in chassis plate as shown in Figure 2.
- Fit unit to chassis plate and secure with 2 screws, nuts and washers, using the slots
provided at the top and bottom of the case.
Warning: Do not drill the product case or use self-tapping screws.
4.4 Installation in a panel cutout:
(Minimum panel thickness 1 mm if the bezel is used).
- The product has integral threaded inserts (M4 x 0.7) at the top and bottom of the front
panel.
- Two M4 x 25 mm screws are provided, together with fibre washers and a bezel.
Warning:
Do not use screws over 25 mm in length -danger of electric shock.
- Cut the panel to the dimensions given in Figure 2. Drill the screw holes in the panel in
the positions indicated.
- Remove the backing from the gasket supplied and apply to front face of the product.
- The bezel can be used to enhance the appearance of the panel cutout. If required, fit
this to the outside of the panel.
- Fit the unit from the rear of the panel, and secure using the screws, washers (and bezel)
provided.
- Tighten the M4 screws to 1.0 - 1.2 Nm.
Warning: Do not drill the product case or use self-tapping screws.